Burring machine



Nov. 25, 194L l w.` MAKENNY 2,263,897

BURRING MACHINE Filed'oot. 25, 1958 2 sheets-shea 1 ,la UIB' Au- Z Nov. 25, 1941. w. MAKENNY y BURRING MACHINE Filed Oct. 25, 1938 2 Sheets-Shea?I 2 umm ATTORNE Patented Nov. 25, 1941 BURRING MACHINE William Makenny, Mountainview, N. J., assigner to Westinghouse Electric & Manufacturing Company, East Pittsburgh, Pa., a corporation of Pennsylvania Application october z5, 193s, serial No. 236353 (c1. 51v4 i 7 Claims.

This invention relates to the finishing of radio tube bases and other shells, and more particularly to a burring machine, and method of burring, particularly adapted for the purpose.

The principal object of my invention, generally considered, is to provide ,for the finishing of radio tube bases and other shells, in an ecient and expeditious manner, preferably making use of a machine which advances the shells along a runway and effects their rotationwhile subjected to the action of an abrasive wheel, for removing the feather edge and beveling to the desired extent.

Another object of my invention is the provision of a machine for feeding radio tube bases or other hollow cylindrical shells to a runway along which they are carried and rotated, while the lower edge of each is subjected to the action of an abrasive wheel.

A further object of my invention is the provision of a machine fornishing radio tube bases and other similar cylindrical shells, in which a lrunway is provided along which said shells are pushed and rotated, means being disposed above the line of shells in said runway for pushing on the tops thereof and urging them into engagementwith a rotating abrasivewheel, inorder to effect a burring action on thefl-lower edges thereof. f

A still further object of my invention is the provision of a rotatable endless belt as part of a burring machine, with aseries of levers carrying rollers engaging saidv belt, and-resiliently urged to cause shells in a runway, partially. deiined by said belt, to be rotated while edges thereof are burred. Y Y

An additional object ofmy invention is the provision .of an improved method of burring radio tube bases and other cylindrical shells, comprising advancing and rotating said shells with their open ends down while causing them to pass by a slit in a runway, and abradingthe edge portions thereof, which extend beyond said slit. Y

Other objects and advantages of the invention, relating to the particular arrangement and construction of the various parts, will become apparent as the description proceeds.

Referring to the drawings illustrating my invention:

Figure 1 is an elevational view of a hollow cylindrical shell, or more specifically a radio tube base, nished by the application of a bevel to -its upper edge, in accordance with my invention.

Figure 2 is an enlarged fragmentary vertical sectional view ofthe base shown in Figure 1.

Figure 3 is a view corresponding to Figure 2, but showing a base after being pressed, andbefore the upper edge portion thereofl hasv been beveled. Y Y

Figure 4 is a plan of a preferred form of machine, embodying my invention.V K

Figure 5 is an elevational view of the machine shown in Figure 4. l Y,

Figure 6 isa sectional view of the machine on the Vdirection of thearrowa, l ,Y 1 l Figure 7 is a fragmentary sectional View of the machine on the line VLI-VII of Figure 6, in the direction of the arrows. Y

Figure 8 is a fragmentary elevational View of the machine on the-lineV VIIIV-VIII of Figure 4, in the direction of the arrows.

Figure 9 is a perspective view of one of the bell-crank devices which act on the shells duringv the process of burring. Y

Referring to the drawings in detail, like parts being designated by like reference characters, there is shown a rotating dial II, upon which a I supply of shells or radio tube bases l2 is fed from a chute or hopper` I3. The chute I3 desirably feeds the s heus lz so thai-they au open downwardly but, if provision for this is not made, an operator will have to be stationed at the dial I l Ain order to effect the necessary turnover of any shells or radioH tube bases, so that they all vopen downwardly before'they pass to the runway I4 therebeyond The dial II has an enclosing wall I5 so that the elements I2 thereon will not be thrown 01T by Ycentrifugal force, and a port I6 Vmay be provided insaid wall to discharge a surplus of the shells for transfer back to the source of supply, in case the. feeding rate thereof is excessive. i

, lMeans disposed above the dial II are provided for guiding the shells I2 into Athe runway i4, said means in the present embodiment consisting of a resilient member I'I supported from a bracket I8, mounted on the frame I9 of the machine, as shown in detail in Figure 8. A guard member 20 having diagonal slots 20 to allow for adjustment on bolts 30, is provided as `shown most clearly in Figures 4 and 8. The guard 20 carries a curved arm 30', as bymeans of bolts, forming an adjustable part of the enclosingwall I5 vfor dial II, and an arm 40 extending over the shells I2 as they are fed to the runway I4, in order to prevent the passage of shells which are Aunduly tall. Shells engaged by the arm 40 are deflected and caused to push by the resilient member l1, acting as avalva-to Vbefejected from the port I6 and removed, if noticed by the operator. In any event, such oversize shells would not be allowed in the runway I4. An adjustable guiding member 2I is positioned adjacent the entrance to the runway I4 in order to effect the desired reception of the shells I 2.

The runwayMIfI of the present embodiment comprises a Afloor portion 22, and a single side wall portion 23, forming guard means, spaced to leave a slit or slot 24, through which a lower edge portion of each shell I2 extends, as shownV most clearly in Figure 6, so as to be engaged by an emery or other abrasive wheel 25, for removing the feather edge and applying fthedesired bevel thereto. In order to insure that the shells,

I2 will be burred around the entire circumference, the same are not merely fed lineally t the runway I4 from the rotating dial, but are caused to rotate while moving forward through the action of an endless belt 216, pressed into engagement with the sides' thereof by a plurality of rollers 21, each of whichis carried-by a lever `28 -rotatingly mounted, as indicated at 2S, and resiliently urged into engagement with the belt 26 by any desired means, such as coil springs 3I,

Aever pulleys 33 and 34, one of which is 'geared to the motor 35 through clutch 36, worm 31, and v-wheel 38. The wheel shaft 39 may carry a Apulley 4i over -which passes a belt 42 which may serve to drive the disc I I. A-n idler pulley `43 may serve -for tightening the belt and directing 4its action.

In the present embodiment, the abrasive wheel '25 is shown mounted on a shaft carried by hearings l and 46 and independently driven by motor 4-I through clutch 48. It will, however, he -understood that a single motor may .serve -for driving lthe enti-re machine -if desired.

In Vorder to insure that -each -shell 'isA pressed A,downward in the runway I4 -until its lower edge thereof is bur-red to the desired bevel, I- provide aser-ies of presser devices vIIS mounted on a support -5I and each resiliently urged in-to engagement with `the top of a shell therebeneath, as by means of a coil spring 52. The su-pportiBi is ad- Vjustably clamped on standards -50 4as byrneans of Ywing nuts Each device 49 may beshaped as a bell crank with a depending presser arm 53, `the lower edge of which is beveled `or curved, vas indicated at 54, -so -as to ride up .on an oncoming shell 'and `aveid ystoppage of the latter. `The Apresser devices 49 are small in width, com- -pared with the shells, as indicated most clearly in Figure 7, so that-at -least one device is always pressingV one shell independently of anything else, vthereby avoiding the possibility that one device vwill Astraddle two shells and obviate `the application of any pressure to the shorter thereof. The -lewer bell crank -arm carries the presser element 53, while .the upper arm 56 serves to prekvent yundue depression -of the -presser arm -53 by engaging the support 5I as a stop. kThis avoids the possibility that the temporary absence .of `shells therebeneath will permit undue depression 'of one or more presser elements '48, resulting in subsequent stoppage of the ow of shells through the machine.

After each shell has passed by the abrasive wheel 25, and been burred and beveled around its entire periphery to change it from the shape shown in Figure 3 to that in Figure 2, it is discharged from .the machine at the outlet end 51 0f the lunway, as shown mest clearly in Figures 4 and From the foregoing disclosure it will be seen that I have provided a machine which receives radio tube bases or other shells, carries them along a runway while causing them to rotate in engagement with an abrasive wheel, thereby burring and removing any feather edge therefrom, to `prei/'ide the desired beveled edge. It will be noted that because of its adjustability the machine is adapted for burring devices of diameters and heights varying over a comparativelyY wide range, and that, on account of the presser arms 53 engaging the devices adjacent their peripheries, rather than at their centers, radio tube bases having bottom lugs projecting from their center-s may be burred, as well as those of .the type illustrated. Although a preferred embodiment of the invention has vbeen disclosed, it will be understood that modications may be made within the spirit and scope-of the appended claims.

'I claim:

1. In a burring machine, .a runway for shells, a belt associated with said runway for rotating said shells as they pass therealong', `lex/'erecariied roller means resiliently .engaging the surface of :the ibelt, opposite .to that .engaging said shells, for causing the necessary .driving .engagement with said shells, and :an abrasive wheel disposed on the other `side .of said runway ior engaging the edges of said shells extending therethrough and etfecting a hurling action thereon- :2. I;n a barring machine, means :for rotating .shells as they nass ftherethmhghmeans for burr ring edges oi said shells While rotating, and Yrlieaiis comprising pivoted belhcrank .shaped de.- vvices. ydenendihe arms of winch `engage the tops 'of' :said shells, .and l,spring :engaged portions ex.- temiine at an yangle therefrom to hubs, terrash- .iehtly lpressing down son the tops `of :seid Ashells to urge them into operative relation ,w,i said hunting means.

3. In a burning machine. a run-way for shells Aecm-prising a door, one .side .wall spaced there.- ;irom fto leave a -slit, a rotatable. endless belt forming anotherside wall, means :tor .advancing vsaid yshells along said :runway .and .frotatmg and resiliently urging said belt against said :shells to cause the latter to rotate .as they advance, with .edge portions thereof extending through .said slit. an abrasive wheel rotatable ladjacent .said slit to grind the edge portions .9i said-shells extending therethrough, and means for resilientlv pressing down .on the Atops .of said shells in sa1d runway 'to keep .them in position and urge them toward said wheel, wuntil ,the desired Ileur-ring action has been eected thereon. l

4. `In a burring machine', a runway for shells comprising a floorand .one xed sidewall kspaced `-from said oor to fleave `a slit, an endless belt, passing around pulleys turnable about rupright taxes, forming -the other side -avail, means for advancing :said shells .along vsaid runway, means for Arotating .one of said Vpulleys to cause the wall.- forming .portionof said belt to move in the direc@- ltion .of travel vof said shells, resiliently ,pressed rollers engaging .-the ysurface .of -said belt. eppoisite to that adjacent said shells, to resiliently urge said belt into driving engagement with said shells to cause the latter to rotate and stay in engagement with said iiXed wall as they advance, with edge portions thereof extending through said slit, an abrasive wheel rotatable about a normally horizontal axis, with its peripheral portion adjacent said slit, to grind down on the edge portions of said shells extending therethrough, and means for resiliently pressing down on the tops of said shells in said runway to keep them in position for urging them toward said wheel, until the desired burring action has been elected.

5. In a burring machine, a runway for shells, means for rotating said shells in said runway, lever-carried roller means resiliently engaging the surface of said rotating means, opposite to that engaging said shells, for causing the necessary driving engagement with said shells, and abrasive means disposed on the other side of said runway for eiecting a burring action on the edges of shells extending therethrough.

6. In a burring machine, means for rotating shells as they pass therethrough, means for burring edges of said shells while rotating, and means comprising pivoted bell-crank shaped devices which engage said shells, and means resiliently acting thereon for pressing down on the tops of said shells to urge them into operative engagement with said burring means.

7. In a burring machine, a runway for shells, comprising a floor, one side wall spaced therefrom to leave a slit. movable means forming another side wall, means for advancing said shells along said runway and effecting movement of said other side-wall-forming means, means for urging said moving side-wall-forming means against said shells to cause them to rotate as they advance, with edge portions extending through said slit, abrasive means acting adjacent said slit to grind the edge portions of said shells extending therethrough, and means for resiliently engaging the tops of said shells in said runway to keep them in the desired position.

WILLIAM MAKENNY. 

